The term 'diminish or abate' can be summarized by two crossword solutions: 'EBB' (3 letters) and 'EASE' (4 letters). 'EBB' is a verb meaning to gradually decrease in size, strength, or intensity. It is often used to describe the receding of the tide. 'EASE' is a verb meaning to reduce in intensity or degree, making something less severe or difficult. Both words are used to describe the concept of diminishing or abating something.